lynna

how much force is exerted to lift 750 kg of water in the well against the force of gravity? How much work is done to lift this water 0.05m? How does this compare to the work done by the man in the treadmill?

Gravity accelerates objects downward at 9.8 m/s. How much downward force does the man generate with each step he takes? how much work is performed when gravity pulls him down 0.5m after each step?